Nut-turning tool



A. G. ADAIR. NUT TURNING-TOOL. APPLICATION FILED DEC- !6. IQIB.

Patented Feb. 3,1920.

INVENTOR A da'i r ADOLPIIUS G. ADAIR, OF SEATTLE, WASHINGTON.

NUT-mamas roo Application filed Deoember 16, 1918. I Serial n geap ii,

7 To all whomz't may concern:

Be it known't'hat I, AnoLPHUs G. A AIR, a citizen ofthe United States, and resideiitfof the city of Seattle, county of King, and State of Washington, have invented certain new and useful Improvements in Nut-Turning Tools, tion. I

My invention relates to pneumatic motor devices and consists of certain improvements to pneumatic motors desi ned to better adapt them for certain special purposes,

.The objects of my invention are twofold; first,'to provide an attachment for pneumatic motors, whereby they may be used to better advantage in such work as turning up nuts; and second, to provide means of which the following is specificawhereby the application of air to drivelsuch motors is automatically controlled by the torque which is communicated to the handles by which'the machine is held in place.

The features of my invention, which I deem to be novel, will be first described and then particularly defined by the claims. In the accompanyin drawings I have shown my invention embodied in preferred constructions.

Figure 1 is a side view of a motor showing a portion of a driven gear in section.

Fig. 2 is an enlarged detail of that one of the handles through which the air for operating the motor is conveyed, illustrating the manner of automatically controlling the supply of this air. c

Fig. 3 is an end view of the gear at the end of the motor casing.

Fig. 4 is a cross section through this handle.

In the drawings, 1 represents a pneumatic motor, such as is quite widely used for reaming and boring holes, and such other devices wherein the work is of a rotative character.

The casing of such a motor is usually provided with handles, as 2, whereby the same is handled and controlled. Usually the air for operating the motor is supplied through one of these handles, which for this purpose is a tube.

Within this handle is a valve mechanism by which the air is controlled and this valve is controlled through the medium of a sleeve or like member, 3, which is mounted on the outside of the tube so that it may be turned.

One way of doing this is to employ a diagonally positioned slot 30 in the sleeve and Specification of Letters Patent.

Patentedlieb. 3, i 9 2o.

in some w ay"with the valvefbywhichithe an is controlled. As the particular" construotion of the valve for doin "thiswork forms no of my invention I h'ave not illustra'tted the same indeta'il;

As a part of my invention I have, provided means whereby the controlof this valve ,is automatically secured throu'gh the" lateral w n r rqu g v toi fi l mnd e .2 by e renewed "the" an entertaine by" the device. To the h'andle '2'i'ssecuredaspring bare. Preferablyithisis secured ateach end, "as by'tlie use of U-bolts'40? Th central portion'of this spring bar is'preferably held normally at a little distance from the handle 2 p Carried by the spring bar 4 is a finger or arm 5 which extends over anchagafinstthe sideof the rotative sleeve 3,'jthrough which the valve is controlledf" This sleeve is provided with a pin se'which is engaged by the forked end of the finger 5, so that if the bar 4 be pressed toward the handle 2, the sleeve 3 will be turned in such direction as to shut off the supply of air.

In using a device of this sort it is common to have one of the arms engage the body of the workman and in thisway to resist the turning effect communicated thereto by the resistance of the tool being operated thereby.

The spring 4: will be of sufiicient strength that it will not be bent enoughto close off the air until this torque exceeds the desired strength. If, however, from any cause, as a sudden sticking of the tool, this torque should suddenly rise above a safe point, the spring 4 would be suddenly pressed inward or toward the handle 2 and this would result in immediately turning the sleeve 3 and thus cutting off the supply of air. The device thus works effectively as an automatic stop and safety device.

For some kinds of work, as for turning up heavy nuts, the device as ordinarily constructed, is both lacking in strength and otherwise not as well adapted for this purpose as desired. To cure this I have provided a special head 6, which bolts on to the casing as a substitute for and in the same manner as the ordinary head. This head has a central boss 60, through which projects a shaft 61, which represents the tool receiving shaft of the ordinary construction. Instead, however, of this shaft having secured a pin 31 entering said slot and connecting thereto some means for holding a tool, it has secured thereto a small pinion 62.

At one side of the head 6, substantially in line with the outer side of the casing 1, is a boss 63, in which is journaled a shaft 64:.

This shaft has secured thereto agear wheel 7. This gear wheel preferably is an internally toothed wheel and meshes with and covers the pinion 62. The shaft 64 is provided with a socket 65, or other means by which the tool, which is to be used, may be secured thereto. 1 have herein shown a socket wrench extension 8 as secured thereto. As thus illustrated the device is adapted for turning up nuts.

By reason of the above modifications of construction, the motor is able to exert a heavier turning effect upon the nut and also by reason of the fact that the shaft 8 is placed over to one side of the casing, it will be possible at times to use it in places where otherwise it could not be conveniently used. Further, the position of the gear wheel 7 makes it serve as a cover and protection for the pinion 62.

What I claim as my invention is:

1. The combination with a power driven hand tool having a rotative tool holding member and handle bars extending outwardly from the axis of rotation thereof, of

a power cut-off device and a spring bar ried by one of said handle bars and having a controlling connection with said power cutoff device, whereby the power will be automatically cut-off by a super-normal torque.

2. The combination witha power driven hand tool having a rotative tool holding member and handle bars extending outwardly from the axis of rotation of said tool, of a power cut-off device, a spring bar extending alongside of and normally spaced from one of the handle bars and means connecting the said spring bar with the power cut-off device to cut oii the power by the engagement of said spring bar with the body under a super-normal torque.

3. The combination with a pneumatic car motor device of the class described, of an air k controlling valve mechanism having a rotative sleeve mounted upon a handle and means connecting said sleeve with the valve to control it, a spring bar extending lengthwise of and secured by its ends to said handle with its central portion spaced away from the handle, and an operative connection from said spring to the valve controlling sleeve.

Signed at Seattle, King county, WVashington, this 10th day of December, 1918.

ADOLPHUS Gr. ADAIR. 

